Question 1158119: Which statement(s) is/are correct about the t distribution?.......A. Mean = 0
B. Symmetric
C. Based on degrees of freedom
D. All of these are correct
Answer by jim_thompson5910(35256)   (Show Source):
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Answer: D. All of the above
The center of the T distribution is always t = 0, which is the mean. Positive t values are on the right while negative t values are on the left. The graph is symmetric as the T distribution curve looks similar to a normal distribution bell curve. The degrees of freedom (df) is determined by the sample size since df = n-1, and the degrees of freedom determines the shape, height, and spread of the curve. This is why choices A through C are true statements, and why choice D is the best answer.
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